Coating machine



J. H. MURCH' COMING MACHINE Dec. l4 19%;

Filed sepi. 11, 1942 5 sheets-sheet 1 J.v H. MuRcH 2,3961

comme MAcHINE Filed sept. 11, 1942 5 sheets-snaai 2 SOU RCE 0F STEAM SOURCE OF' SOUECE OF I i) f/ J. H. MURc-z Eg COATING MACHINE Filed Sept. 1l, 1942 l 5 Sheets-Sheet 3 v/i ./47

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' Dec. 4p 1945-. J. H. MuRczHv \CoATING MACHINE y Filled Sept. 1J., 1942 I 5 Sheets-Sheet 5 'INVENTOR. J f

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Patented Dec. 4, 1945 UNITED STATESA PATENT OFFICE*- oo'rlzioomNa John n. March, morante, N. s, American Can lCompany, New- Yi assigner to rk, vN. I., a

corporation of New Jersey v Application September 11, 1942, Serial No. 458.021

(Chill-53) In the manufacture of coated fibre milk con-` tainers of the character disclosed in United States Patent 2,085,979, issued July 6. 1937, to v J. M. Hothersall, the container is preferably immersed in a bath of molten parailin wax so that the surfaces of the container are thoroughly covered. After such a coating operation according to established practices the container is placed in position to permit the excess wax to drain away.

It has been found that not all ofthe excess wax drains away from the container during this greater amount of wax than is actually required still remains 'on the surfaces of the container and this excess wax sonietimes is unattractivev in appearance and wenn t Ato the touch. By removing all excess and leavbroken away and `of the apparatus and 'substantially along the line drawings, discloses ,a preferred embodiment thereof.

Referring to the drawings: l Figure 1 is a top plan view of a portion' of a coating machine embodying the instant' invention, with parts broken away and shown in section and with containers shown in place in the machine;

Fig. 2 is an enlarged vertical section taken 2-2 in Fig. 1. with parts broken away and showing containers in place in the apparatus,

Fig. 3 is an enlarged sectional view of aportion taken substantially along the line 3,'3 in Fig. 1. with parts broken away;

Fig. 4 is a side elevation of the portion of the apparatus shown in Fig. 3, withparts broken away and shown Ain lsection;

lng only' that which is required, considerable wax may be saved for reuse in addition to improving the appearance, etc. 5'

The instant invention contemplates overcomiing these diflic'ulties by removing all unnecessary applied coating material from the surfaces of' the containers by the use of an air. blast so that only the required minimum amount of the material will remain in place on the container.

An object thereforel 'of the inventio'n is the provision, in a. machine for applying coating material to the surface of fibre containers, of devices which project a fluid decoating medium against the surfaces of newly coated containers to remove all'excess coating material so that only a predetermined minimum film of the coating material will remain in place on the containers.

Another object is the provision of such devices wherein air is projected against the newly coated surfaces of the containers to remove all excess coating material so that an attractive and clean coated container will result.

Another object is the provision this character which will effect the removal of all excess coating material from containers while they are moving at high speed and in a continuous procession so that continuous high speed production may be had.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanying -along the line 8-8 in along a plane indicated Fig. 5 is a horizontal section taken substantially along'the line Bl in Fig. 3. with parts containers in place in the apparatus;

Fig. 6 is an of the air blast units, shown in section;

Fig. '7 is a sectional view taken substantially by the lines I-1 in Fig. 6: taken substantially enlarged perspective detail of one Fig. 8 is a horizontal section Fig. '1; Fig.. 9 is an enlarged side elevation of certain v parts of the apparatus as viewed along a vertical its adjacent parts shown and vl4:5 of devices of plane indicated by parts broken away;

Fig. l0 is a sectional the lower right in Fig. 2.

the line 9-9 in Fig. 1, with detail of parts shown at with the container and in a different position;

Fig. 11 is an enlarged schematic perspective view ofthe parts vshown in Fig. 4, with parts broken away and shown in section.

`As a preferred embodiment of the present invention the drawings illustrate principal parts of a coating and treating machinel for applying a coating of paraffin wax or thelike onto containers, as for examples the fibre milk container disclosed in the Hothersall A The container is indicated by the letter -b in the drawings. The container referred to preferably is square in cross section although the invention is equally well adapted to cylindrical containers. Such a square container is formed in its top end with a dispensing o` ning cwhich is adapted to be closed with a friction plug closure element d hingedly secured to the container top.

In the machine illustrated in the drawings, the

with parts broken away and Y patent above mentioned. l

,Y container in an onen Fig. 1.

empty containers b are fed by a continuously moving conveyor A through a coating chamber B in which the containers receive a coating of paraffin wax. The' chamber B is heated preferably to facilitate application of the wax in a molten condition.

The freshly coated containers are received from the coating conveyor A in a continuously rotating transfer mechanism C and are carried through a curved path of travel of approximately one hundred eighty degrees. During this curved travel of a container, its exterior surfaces are subjected to an air blast. This air blast removes all excess wax and leaves the containers with a clean, attractive appearance and with a minimum nlm of the wax in place to serve as a protective coat- `casing that encloses the coating chamber B. The

conveyor comprises a plurality of V-shaped buckets I3 (Figs. 1 and 2), which are semi-circular in cross-section and which are connected together by pairs of links -to form an endless chain. This conveyor travels over and is driven by chain sprockets located at opposite ends of the machine.

The coating conveyor A is guided ina straight line path of travel by upper and lower guide tracks Il formed in brackets I5 bolted to cross-I beams Il of the main frame. 'I'he containers propelledby the conveyor fit into the V-shaped buckets |3 and are retained in place by a pair of spaced and parallel guide rails I8.

A closure guide rail I! is disposed adjacent the rails I8 for holding the closure element d of the position. as best shown in It is while the containers are moving along with this conveyor that themolten wax coating is applied. This coating may be anplied by immersion or spraying or in any other suitable manner. Coating by' immersion and using the same type of conveyor A is disclosed in the James H. Gordon, Jr., Patent 2,298,289 issued October 13, 1942, on Coating machine. "I'he conveyor advances the freshly coated containers in an upright pomtion toward the transfer mechanism C.

containers b. Vertical ribs 33 on the sides of the blocks engage against the containers to reduce 'contact with the outside surface of the containers.

The turret body`26 is mmmtcd on a vertical shaft 38 which is joumaled in upper and lower bearings 31, 38. The upper bearing 31 is formed in a cover part 39 of the housing 25 while the lower bearing 38 is formed in a. member 4| of the main frame. The shaft is continuously rotated in time with the other parts of the machine by a spur gear l2 which is keyed to the upper end of the shaft.

Hence as the shaft 3B rotates the turret body 26, the lower set of pockets 32 between the turret blocks 29 pick up the containers from the coating conveyor A as the pockets come adjacent the conveyor, and propel them along the curved path of travel hereinbefore mentioned. A curved guide rail M (Fig. 1) disposed adjacent this path of travel retains the containers in place in their turret-pockets.

Dlu'ing this travel of the containers with the transfer turret,..excess wax on the containers is prevented from adhering to the turret parts by maintaining the latter in a heated condition. For this purpose the turret body is made hollow and l steam, hot water,-or any other suitable fluid heating medium is circulated therethrough to heat the turret parts to the proper temperature.

Circulation of the heating medium through lthe turret body 28 is effected by way of an inlet bore 45 (Figs. l and 2) which extends down through the middle of the upper portion of the vertical shaft 38. The upper end of the bore communicates with an inlet tube I8 which is suitably secured as by a slip joint in the upper end of the shaft. The tube leads from any suitable supply of the heating medium.

The lower end of the inlet bore l5 terminates adjacent the upper end of the turret body 26 and communicates with the interior of the turret body by way of a port 48. This port extends through the inner wall of the turret body and through theshaft 38. Near the lower end of the turret body an outlet port I8 extends from the body interior to an outlet bore l2 formed in the middle of the lower portion of the shaft 38. This outlet bore 52 extends to the lower end of the shaft where it communicates with a discharge tube 83. The discharge tube is suitably secured as by a slip or universal joint in the lc `ver 'I'he transfer mechanism C is disposed adjacent the coating conveyor A and is enclosed in a vertical multiple part housing 25 (Figs. 1V and 2). A portion of this housing is formed integral chamber casing |I.

Within the housing, the transfer mechanism includes a rotatable turret body 28 (Figs. 2, 3, 5 and 11) having a plurality of flat faces 21 on which are secured a plurality of pairs of vertically with and extends up from the coatingspaced upper and lower triangular blocks 28, 29.

'I'hese pairs of blocks are equally spaced around the outer periphery of the turret body. Taken collectively the peripherially spaced blocks set oil' between them a plurality of V-shaped upper turret pockets 3| and lower pockets 32 which extend around the turret body for receiving the end of the shaft and leads to any suitable place of deposit for the heating medium. It is this construction, that permits of the circulation of the heating medium through the turret body.

Immediately after a lower pocket 32 of the transfer turret has picked up a container b from the coating conveyor A, the container begins an upwardl travel as well as the curved travel. For the first degrees of curved travel, i. e., about one-half its full curved travel. the container moves up into the upper pockets 3| between the upper blocks 28.V This upward travel is effected by a vertically disposed lift bar 51`(Flgs. 1, 2 and 10) There are a plurality of lift bars 51, one for each set of upper and lower pockets 3|, 32 and they are located adjacent the inner ends of the pockets. These lift bars slide in vertical grooves 58 formed in the outer side wall of the turret body 28. The lower end of each lift bar is formed with an outwardly extending foot 59 which projects under the container.

The upper ends of the lift bars 51 project up through slideways 62 formed in a disc 93 (see also Fig. 11) having a depending iiange hub 94 which is bolted to the top of the turret body 29,' The disc thus rotates with the turret body. The upper ends of the lift bars 51 are fornied with rack teeth 96 which engageA with lifting gears 9] (see also Fig. 9) of lifting devices 99. There is one of these lifting devices for each lift bar 91.

The lifting gears 61 of the lifting devices 99 are mounted on the inner. ends of short horizontal shafts 1| which are carried in bearing brackets 12 bolted to the top of the disc 93. There is one bracket for each lifting device. The outer ends of the shafts 1| carry pinions 19 which mesh with segment gears 14 mounted on short shafts 15 carried in the bearing brackets. The shafts 15 also carry cam arms 16 having at their outer ends, cam rollers 11 which operate between two spaced and parallel cam edges 19, 19 (Fig. 2) of a pair of upper and lower stationary ring cams 9|, 92. Thesev ring cams are bolted in place within the housing 25. Hence as the disc 99 rotates with the turret body 26, the cam rollers 11 of the lifting devices 69 traverse the cam edges 19, 19 and thus rock the cam arms 16. Rocking of these arms rotates the segment gears-14, the pinions 13, and the rack gears 91 and thus raises and lowers the lift bars 51 at the proper time. Raising of a lift bar brings its foot 59 into supporting engagement with the bottom of its associated container and thus lifts the container vertically while it is moving around its curved path of travel. f

As soon as a container is engaged by a lifter foot 59 it is locked in place against lateral displacement from its lift bar. This is brought about by a locking nnger 95 (Figsf 2 and 10) which is mounted on a pivot pirk99 secured in an insert block 91 carried in the lift bar. There is one of these insert blocks-and its locking finger for each lift bar.

'Ihe locking finger 95 extends outwardly over ythe top of a container adjacent a lift bar and is formed with a notch 9| which is in alignment with the end seam of the container. The inner end of the finger is formed with a, tail 92 which extends through a slot in the insert bloei: 91 and engages against the Vouter surface of the turret body 26. A compression spring 93 retained in a bore in the insert block presses against the locking nger and holds its tail in engagement with the turret body.

The engagement of the tail 92 of the locking iinger 95 against the outer surface of the turret body 26 retains the nger in a raised position over a container as best shown in Fig. 2. 'This position of the linger permits of the ready insertion of a container into its turret lpocket 32. However, as soon as the seated container begins to rise with its lift bar 51, the` tail of the locking finger rides thus locks the latter in place against displace ment from the lift bar while it is being elevated into the upper pockets 3| between the upper turret blocks 28.

During this upward travel of the' container, the

excess wax is blown off its top, side, and bottom surfaces by a blast of air which is directed against these surfaces. This blast of air issues from inner and outer -air heads |9|, |92 which rotate with the turret body 29 and the disc 99.

The inner air heads |9| 'are triangular in shape to correspond with the upper turret blocks 29.

Each head preferably ismade in three pieces, a

-top member |94 (Figs.'3, 6 -and '1), an intermediate member |95 and a bottom member |96. These parts are superimposed one upon th other and are all secured by a bolt |91 to the bottoms of the upper turret blocks 29.

The sides of the bottom member |99 adjacent the upper turret pockets 3| are beveled inwardly into the upper pockets 3|.

' ber |99. way o f ports H9, I I1 in the intermediate member` with openings. H9, H9 formed in the adjacent Air under pressure is supplied to the slots ||2 by way of passageways M4. ||9 formed in the bottom of the intermediate member |99 along its sides, adjacent the slots |I2 in the bottom mem- These passageways-,communicate by superimposed top'member |94.

The openings H9, ||9 in the top member |94 of the 'air heads |9| are in' communication -with the lower` ends of la pair of pipes |29, |29 which extend up through the turret blocks 29. The upper ends of these pipes are connected by flexible tubes |21, |29 to pipe nipples |29, |39 which aresecuredinto the bottom of the disc 93.l The nipples communicatewith horizontal radial bores |35 (see also Fig. 11) which are formed in the disc.

It should be noticed in this connectionthat each horizontal bore |39 is in communication with the tube |29 for one head |9| and with the tube |21 for the next adjacent head |9|. This is best illustrated in Figs. 4 and 1l. Such a construction,

permits of greater vspeed in remoging the excess y wax from the containers, as will be hereinafter ex'- plained in more detail. i

The inner ends of the horizontal bores |99 communicate with separate vertical bores |91 which are formed in an enlarged hub-|99 on the disc 99. The upper ends of these verti al bores register' with corresponding holes I formed in a hardened plate |4|fsecured to the top of the disc hub. When the machine is in opera-'f tion the hardened plate |4| on the disc hub |99 rotates against a stationary plate |49. This stationary plate is formed with an elongated slot |45 into which the holes |99 of theplate come into register as the plate rotates. vThe slot is Just long enough to have two holes|39 in register with bearing 31 and is'locked in place against rota.-l tion by a tongue and groove connection |511/v formed between the skirt and the sleeve. connection holds the cover member and itsl plate |49 stationary. A compression spring |52 disposed around the sleeve 'and interposed between the vshaft-bearing 31 and the cover member |41 holds the stationary plate tightly against the rotating plate |4| so that leakage of air between the plates is prevented.

The cover member |41 is formed with an annular groove |55-which is in communication with the elongated slot |45. Groove |55 is also in communication with a feed pipe |56 which is threadedly secured in the cover member. pipe leads from a suitable source of supply of compressed air. It is this air that issues from the nozzle slots I2 in the inner air heads |0|.

The outer air heads |02' are formed in quadrantsl |6| (Fig. 5) of a head ring |62 which is disposed adjacent the inner heads and which surrounds the transfer turret. This head ring and a cooperating bottom ring |63 (see also Figs. 2 and 3) rotate with the transfer turret. lFor this purpose the rings |62, |63 are secured by bolts |64 to support arms |65 which depend from the disc 63.

The inner edges of the head ring quadrants 6| are serrated to provide V-shaped pockets |61 which form a major portion of the outer heads |02. These pockets are located opposite the pockets 3| of the inner heads |0| and taken together form rectangular clearance openings between the turret and the surrounding head ring |62 for the passage of therising containers. In this manner a rising container is substantially surrounded by the combined inner and outer air heads |0|, '|02 as it passes up into the upper turret pockets 3|.

Adjacent the pocket edges of the head ring |62, the bottom of each ring quadrant is formed with a groove |1|. The inner ends of these grooves terminate adjacent theinner peaks of the serrations and are disconnected from the grooves of the adjacent heads. The outer ends of the vgrooves of each head are connected so that there will be a continuous passageway along the pocket ofA each head |02. Each set of grooves is connected by a port |12 in the head ring and a connecting passageway |13 in the support arms |65, with a port |14 in the disc 63 which leads from the horizontal bores |35 in the disc.

'I'hus compressed air from the main source of supply as it enters the horizontal bores |35 for distribution to the inner heads |0|, also ows by way of the passageways |13 in the support arms to the grooves |1| of the outer heads |02. Thisv air issues from the heads |02 by way of nozzle slots |16 (Figs. 2 and 3) which are formed between the inner edges of the head ring |62 and its cooperating bottom plate |63. For this purpose the inner top edge of the bottom plate is beveled outwardly to form the space which constitutes the nozzle slots. The inner lower edge of this plate is beveled inwardly and is formed with ribs |11 for guiding a container up through the rectangular openings formed by the cooperating inner and outer pockets 3|, |61.

Thus as a container b rises up by elevation of a lift bar 51, the hole |33 in the rotating plate g |4| connecting with the air pipes, passageways and ports leading into the inner and outer heads IUI, |32 adjacent the container, comes into register with the elongated slot |45 in the stationary plate |43 and thus permits compressed air from the groove |55 of the cover member |41 to flow into the air heads and to issue from their nozzle slots ||2, |16. The hole |33 remains in'register with the elongated slot |454 until the container nearly reaches the top of its up-travel. 'I'he remainder of the up-travel is covered by the next following hole |33 and by the pipe connection Din-ing this blast of air from the head nozzleQ alots,||2, |16 the container moves up past the This slots, through the rectangular opening formed by the head pockets, and into the upper turret pocket 3|. While the container is thus moving up the blast of air impinges rst against and across the top ofthe container and blows off any excess wax adhering to this surface. As the container ascends the air blast next impinges against the Asides of the container and thus wipes down any excess wax which may be on these surfaces. 'I'his wiping action flows the excess wax downwardly along the sides of the container until it reaches the bottom. As the bottom of the container passes the nozzle slots, the wax gathered at this portion of the container is blown off and falls to any suitable place of deposit from which it may be collected for reuse.

1n order to prevent the blown oil' wax from solidifying onto the parts of the outer air heads |02, the heads are heated by a suitable heating medium such as steam, hot oil, hot water or the like fluid. 'I'his fluid is circulated through a jacket |6| (Fig. 2) which surrounds the head parts and which is bolted to the heating chamber casing l. The heating medium is circulated through this jacket by way of an inlet pipe |62 which leads from a suitable source of the heating medium and by way of an outlet |83 formed as a para; of the jacket.

The lifting of the container for the excess wax removing operation is effected as the transfer turret travels through slightly less than 90 degrees, as hereinbefore mentioned. As soon as the container reaches the peak of its up-travel, it immediately begins to descend to its original level. This descent of the container is brought about by the same elements that elevated it and in substantially the same angle of travel of the transfer turret. However, during this down-travel no air blast is applied to the container. The port |39 which admits air into its heads 0|, |02 passes beyond the elongated slot |45 at the peak of the up-travel of the container. Hence the air communicating with the heads |0|, |02 is cut off for this down-travel of the container.

On the down-travel, the rotating transfer turret brings the container into reach of the cooling conveyor D. 'I'his conveyor preferably includes a'horizontall endless chain |35 (Figs. 1 and 2) which operates over a sprocket |66 mounted on a vertical shaft |81 journaled in suitable bearingsv ers |33 are flanged and ride on track rails |35 mounted in stationary position on the frame of the machine. Carriages |3| receive the containers'from the transfer turret when the latter reach their down stroke in the turret and after they have been released by the locking fingers 35, hereinbefore mentioned. A container received in a carriage of the conveyor D is propelled through the cooling chamber E where the desired nlm of wax remaining on the container, after the excess has been removed, is cooled and hardened. The conveyor then carries the cooled container to any suitable place of deposit.

It is thought that the invention and many of its attendant advantages willbe understood from the foregoing description, and it will be apparent that various'changes may be made in the form,

construction and arrangement of the parts withcoated container in-closely nested relation, such arrangement forming a clearance opening through which the container is adapted to be passed while in a vertical position, said head members having nozzle slots in their inner faces through which air under pressure is ejected against the container to remove excess coating material therefrom, and means disposed adjacent said head members for elevating the container through the opening between the head members so that the air under pressure impinges g5 against all exterior surfaces of the container.

2. In a machine for coating bre containers with liquid parain wax and the like,` the combination of a plurality of head members arranged in positions for completely surrounding a freshly which air under pressure is ejected against the container to remove excess coating material therefrom, means for supplying air under pressure to said head members, means disposed adjacent said members for elevating the container said head means,'and means carriedin said turret member adjacent each pocket for elevating a container through the air blast being ejected into its head openingfor wiping the excess coat ing material from the outer surface of the container while it is moving with said turret member.

5. In a machine for coating ilbrecontainers with liquid paraffin wax and-the like, the combination of a plurality of head members arranged in positions for completely surrounding a freshly coated container, such arrangement forming a clearance opening through which the container is adapted to be passed, means for supplying air underl pressure to said head members and into said clearance opening as an sir blast. means disposed adjacent said members for elevating the container through the said clearance opening into the path of said air blast, and a locking finger carried by said elevating means and movable into engagement with the container to lock the same in place on said elevating means during movement of the latter so that excess, coating material may be eiectually removed l from the container.

6. In a machine for coating fibre containers with liquid paraffin wax and the like, the combination of a plurality of head members arranged in positions for completely surrounding a freshly coated container, such arrangement 'forming a clearance opening through which the container is designed to be elevated, said head members having nozzle slots in their inner faces through which air under pressure is ejected against the container to remove excess coating material therefrom', means for elevating the containerthrough the opening between the head members into the path of the ejected air. and means for heating said heads to prevent the removed excess coating material through the opening between the said members 40 from collecting thereon.

in to the path'of the ejected air-and thence for returning the container to its original position,

and valve means for cutting of! the supply ofair bination of a rotatable turret member having a pocket for the reception of a freshly coated container, head means carried by said turret member and disposed above said lcontainer pockets so as to completely surround a container; thereby setting on an enclosed clearance opening through which the container is adapted to be passed, said head means being apertured Afor the ejection of 'u 'sures each of which is adapted to completely ur= a blast of air. under pressure into said opening, means for supplying air to said head means, and

4. In a machine'for coatingvflbre c'cmtainere withiquid wax and the like, the coni- -binationcf @rotatable turret member having a lg5 plurality ct pocketsifor the reception of\ freshly emmen containers. nem means earned s vbysaid turret member and disposed above eachv 'oi said' container. pockets so as to completely surround acontaine'r, 'thereby setting 0R- en- 7o closed clearance openings through whichcontainers are adapted to be passed, said 'head v:means of each container pocket having means for ejecting a blast of air under pressure into its clearance opening, means for supplying air to is 7. In a machine for coatinglnbre containersv with liquid paraffin wax and the-like. the combination of a rotatable turret member having a plurality of. pocketsv for the reception of freshly coated containers, la plurality of head members on said turret -member arranged so that tweedecent head members partially surround a container, thereby setting oi! inner pockets between them and disposed above and in vertical alignment with said turret pockets, said head members having nozzle slots for the ejection of an air blast into and across said head pockets, means surrounding and rotating with'said turret member for setting oi! outer pockets which cooperate with said inner pockets to form a plurality of encloroundy a container, said surrounding means having af'plurality of nomic slots for the ejection of an air blast into andacross said outer pockets.` means for supplying air under pressure to said surrounding means, and means for a, freshly coated lcontainer through said inner and 'Y outer pockets while the container is carried in said rturret member-so that the vair blast issuing from said nozzle slots wipes oif "excess coating material from the top, side. and bottom surfaces of theumoving container.

8. In a machine for coating fibre containers with liquid parailln wax and the like, the combination of a rotatable turret'member having a pocket for the reception o f a freshly coated container, a conveyor for depositing the container into the pocket of said turret member, head means disposed above said container pocket and arranged to completely surround .a container,

thereby setting oi! an enclosed clearance opening through which the container is adapted to be passed, said head means having a plurality of l ports communicating with said opening, means for ejecting a blast of air under pressure through said ports into said opening, means carried in said turret member for elevating the container through the path of the air blast within said head opening for wiping the 'excess coating material from the outer surfaces of the container while it is moving with said turret member, and a discharge conveyor for receiving the wiped of! container fromthe turret member and for carrying it to a suitable place of deposit.

9. In a machine for coating fibre containers with liquid paraffin wax and the like, the combination of a rotatable turret member having a pocket for the reception of a freshly coated container, means for rotating said turret member, head means disposed above said container pocket and arranged to completely surround a container, thereby setting oil an enclosed clearance opening through which the container is adapted to be passed, said head means having a plurality of ports comunicating with said opening, means for projecting a blast of air under pressure through said ports into said opening, means carried in said turret ,member for elevating the container into the path of said air blast, and means for actuating said elevating means to carry the container through the air blast to wipe oil excess coating material from its outer surfaces and for lowering the wiped container to remove it from said clearance opening, the raising and lowering of the container taking place during the rotation of said turret member.

10. In a machine for coating iibre containers with liquid parailln wax and the like, the combination of a plurality of head members arranged in positions for completely surrounding a freshly coated container, such arrangement forming a clearance opening through which the container is adapted to be passed, said head members having nozzle slots in their inner faces through which air under pressure is ejected against the container to remove excess coating material therefrom, and means disposed adjacent said head members for moving the container through the opening between the head members so that air under pressure impinges against all exterior surfaces of the container.

JOHN H. MURCH. 

